Most BCBS policies allow a global fee for chiropractic, so adding modifiers won't make a difference. But I must add, one should never just add a modifier to get a service paid. The provider should indicate if the modifier is appropriate and if it should be applied to the code.

I always bill 97110 and 97530 together with a 59 on the 97530. If they are done in destinct 15 minute sessions, then it is appropriate. Our PT's know that if they write it on the encounter, it means it was in its own 15 minute slot. The notes also reflect that. Good luck!Chris